Subscription tests and domain (#2209)

* Save work

* Subscriptions and trials domain

* Store family ID on customer

* Remove indirection of stripe calls

* Test simplifications

* Update brakeman

* Fix stripe tests in CI

* Update billing page to show subscription details

* Remove legacy columns

* Complete billing settings page

* Fix hardcoded plan name

* Handle subscriptions for self hosting mode

* Lint fixes

config/routes.rb

@@ -54,11 +54,10 @@ Rails.application.routes.draw do
     resource :security, only: :show
   end
 
-  resource :subscription, only: %i[new show] do
+  resource :subscription, only: %i[new show create] do
     collection do
       get :upgrade
       get :success
-      post :start_trial
     end
   end